M. Boyce: The Manichaean Hymn‑Cycles in Parthian, London/New York/Toronto: Oxford University Press 1954; W. Sundermann: The Manichaean Hymn cycles Huyadagmān and Angad Rošnān in Parthian and Sogdian. Photo edition. Transcription and translation of hitherto unpublished terxts, with critical remarks (CII Supplementary Series Vol.II), London 1990